Malicious PDF — malware analysis report

Static analysis result for SHA-256 c579618e8ec5ae49…

MALICIOUS

PDF

78.1 KB Created: 2021-03-03 02:22:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 0fe1ecae8b3f2a61f1b5c51d4a0f3d69 SHA-1: 252259d53c16c93c3c696649d8658e2bf3e5cd1d SHA-256: c579618e8ec5ae49f01219884be2b0254a57c9ca53e480aec4e759266221fd0a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The document contains numerous embedded URLs, many pointing to disposable domains, suggesting a phishing or malware distribution attempt. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a tactic to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://golowaki.ru/123?utm_term=are+any+monster+high+dolls+valuable PDF link annotation
    • https://cdn.sqhk.co/fabozesemi/sidghdA/globe_rewards_kfc_2019.pdfIn PDF document text
    • http://interplast.ru/las_vegas_vacation_packages_american_airlinesesoqg.pdfIn PDF document text
    • http://keep-travel.com/xoxazararofepasam9weh.pdfIn PDF document text
    • http://santaparker.store/749957893117jj8j.pdfIn PDF document text
    • http://motarojetox.sportsontheweb.net/nepabuwiponomuzisodivid.pdfIn PDF document text
    • http://demask.space/mavisuxokoxatiduzozjp6ke.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457281/normal_600a3ceb9777b.pdfIn PDF document text
    • https://cdn.sqhk.co/dilizilozok/fIOpfja/99278941539.pdfIn PDF document text
    • http://mini-cam-v2.club/crazy_frog_axel_video_songtusey.pdfIn PDF document text
    • http://mosebuzixat.mywebcommunity.org/63066344065.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492250/normal_602467202dfdc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382790/normal_5feea859ba4c6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sepuxukejobome.epizy.com/cambium_networks_epmp_force_180_manual.pdfIn PDF document text
    • http://mukanebesiva.atwebpages.com/what_radical_republican_proposal_for_reconstruction_was_defeated_by_its_opponents.pdfIn PDF document text
    • http://sesunofopum.epizy.com/birthday_invitation_template_photoshop_free.pdfIn PDF document text
    • http://dejedizanabi.epizy.com/arduino_free_mac.pdfIn PDF document text
    • http://rikewopuze.epizy.com/driver_canon_ip1800_windows_10.pdfIn PDF document text
    • http://kufekisawisewo.onlinewebshop.net/balonukojeposada.pdfIn PDF document text
    • http://nupuzawov.onlinewebshop.net/vuguwofa.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF543 5528 bytes
SHA-256: 0bb70e827022504fd16ea62ed49982992b4b22ea5213f7262414ca004176c8cc
font_01_sfnt_off000107f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F2 10256 bytes
SHA-256: e7c10034afaa37f4c367b6a661ea5575bf0fa487ee61dd6134f827fe2f7fb06c

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